P TR MR TC MC $30 $0 $15 $30 $30 $30 $25 $10 2 $30 $60 $30 $40 $15 $30 $90 $30 $60 $20 $30 $120 $30 $85 $25 $30 $150 $30 $115 $30 O $30 $180 $30 $150 $35 11. Average cost for the firm in the table A) cannot be determined from the information given. B) is upward-sloping for all output values shown. C) is constant for all output values shown. D) is downward-sloping for all output values shown. E) is U-shaped